Patents by Inventor Tomoshi Tokunaga
Tomoshi Tokunaga has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7831984Abstract: A disk drive includes a disk rotating unit, a traverse base holding the disk rotating unit, a damper member holding the traverse base, a main unit holding the traverse base through the damper member, a tray mounting a cartridge housing the disk, a driving unit that loads or ejects the tray and moves the disk in the cartridge relative to the disk rotating unit, and a traverse base holding member that is moved vertically by the driving unit relative to the main unit at the time of tray loading or tray ejection. The traverse base is held by the traverse base holding member through the damper member, and the resonance frequencies of the damper member in the radius direction of the disk as it is being loaded and in the direction of a rotation shaft are set higher than the maximum rotational frequency of the disk.Type: GrantFiled: July 16, 2009Date of Patent: November 9, 2010Assignee: Panasonic CorporationInventors: Shigeto Ueno, Teruyuki Naka, Shinichi Maeda, Masakazu Ishizuka, Yasuo Kabuta, Isao Obata, Tomoshi Tokunaga, Akira Yoshida
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Publication number: 20100031278Abstract: A disk drive comprises a cartridge holding mechanism which has a small size and reduces a damper load. The disk drive comprises: a spindle motor 91 which mounts and rotates a disk; a traverse base 82 which holds the spindle motor 91; a rubber damper 71 which flexibly holds the traverse base 82; a mechanical chassis 60 which holds the traverse base 82 through the rubber damper 71; a tray 20 which mounts a cartridge 1 in which a disk is housed; and a loading motor 61 which moves the disk in the cartridge 1 close to the spindle motor 91 or away from the spindle motor 91. The cartridge 1 is supported by the mechanical chassis 60 through the tray 20.Type: ApplicationFiled: July 16, 2009Publication date: February 4, 2010Applicant: PANASONIC CORPORATIONInventors: Shigeto UENO, Teruyuki Naka, Shinichi Maeda, Masakazu Ishizuka, Yasuo Kabuta, Isao Obata, Tomoshi Tokunaga, Akira Yoshida
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Patent number: 7581233Abstract: A disk drive includes a cartridge holding mechanism which has a small size and reduces a damper load. The disk drive includes a spindle motor which mounts and rotates a disk. A traverse base holds the spindle motor, and a rubber damper flexibly holds the traverse base. A mechanical chassis holds the traverse base through the rubber damper, and a tray mounts a cartridge in which a disk is housed. A loading motor moves the disk in the cartridge close to the spindle motor or away from the spindle motor. The cartridge is supported by the mechanical chassis through the tray.Type: GrantFiled: January 7, 2003Date of Patent: August 25, 2009Assignee: Panasonic CorporationInventors: Shigeto Ueno, Teruyuki Naka, Shinichi Maeda, Masakazu Ishizuka, Yasuo Kabuta, Isao Obata, Tomoshi Tokunaga, Akira Yoshida
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Patent number: 7526780Abstract: A disc apparatus for recording or reading data to or from a disc includes a tray having a table on which the disc is placed and a shielding member that covers the tray. The shielding member has a circular opening and a plurality of arc protruding members. Each arc protruding member is provided on an inner surface of the shielding member that covers the tray as protruding towards an upper surface of the disc placed on the table of the tray. An end of each arc protruding member is situated near the opening. Each arc protruding member has a protruding end with a height ranging from 1.0 mm to 1.5 mm from the inner surface of the shielding member.Type: GrantFiled: April 11, 2006Date of Patent: April 28, 2009Assignee: Victor Company of Japan, Ltd.Inventor: Tomoshi Tokunaga
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Patent number: 7299480Abstract: A disc drive apparatus includes a tray member, on which a bare disc, or a cartridge accommodating a disc therein is placed, and a disc drive device, into or from which the tray member is loaded or ejected by a drive unit. A medium detection system includes detection holes provided on the tray member to detect a disc or a cartridge. In addition, provided on the disc drive device is a detection unit to optically detect a state including a type of a disc or a cartridge placed on the tray member based on whether the detection holes are shaded in the course of loading of the tray member.Type: GrantFiled: September 16, 2004Date of Patent: November 20, 2007Assignee: Victor Company of Japan, LimitedInventor: Tomoshi Tokunaga
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Publication number: 20060259917Abstract: A disc apparatus for recording or reading data to or from a disc includes a tray having a table on which the disc is placed and a shielding member that covers the tray. The shielding member has a circular opening and a plurality of arc protruding members. Each arc protruding member is provided on an inner surface of the shielding member that covers the tray as protruding towards an upper surface of the disc placed on the table of the tray. An end of each arc protruding member is situated near the opening. Each arc protruding member has a protruding end with a height ranging from 1.0 mm to 1.5 mm from the inner surface of the shielding member.Type: ApplicationFiled: April 11, 2006Publication date: November 16, 2006Inventor: Tomoshi Tokunaga
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Publication number: 20050249101Abstract: The driving state in a loading path is controlled in accordance with a loading operation of a placing member on which a disc-like medium is placed. According to a disc loading apparatus, a placing member on which a disc-like medium is placed is loaded or ejected into or from a disc loading device by a drive unit. The disc loading apparatus comprises a position detection unit which optically detects a position of the placing member in a region of movement concerting at least a portion of the loading path, and a drive profile control unit which changes a drive profile of a drive unit based on a position detection signal from the position detection unit.Type: ApplicationFiled: April 28, 2005Publication date: November 10, 2005Inventor: Tomoshi Tokunaga
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Publication number: 20050204373Abstract: A disk drive comprises a cartridge holding mechanism which has a small size and reduces a damper load. The disk drive comprises: a spindle motor 91 which mounts and rotates a disk; a traverse base 82 which holds the spindle motor 91; a rubber damper 71 which flexibly holds the traverse base 82; a mechanical chassis 60 which holds the traverse base 82 through the rubber damper 71; a tray 20 which mounts a cartridge 1 in which a disk is housed; and a loading motor 61 which moves the disk in the cartridge 1 close to the spindle motor 91 or away from the spindle motor 91. The cartridge 1 is supported by the mechanical chassis 60 through the tray 20.Type: ApplicationFiled: January 7, 2003Publication date: September 15, 2005Applicant: Matsushita Electric Industrial Co., LtdInventors: Shigeto Ueno, Teruyuki Naka, Shinichi Maeda, Masakazu Ishizuka, Yasuo Kabuta, Isao Obata, tomoshi Tokunaga, Akira Yoshida
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Publication number: 20050066341Abstract: A disc drive apparatus includes a tray member, on which a bare disc, or a cartridge accommodating a disc therein is placed, and a disc drive device, into or from which the tray member is loaded or ejected by a drive unit. A medium detection system includes detection holes provided on the tray member to detect a disc or a cartridge. In addition, provided on the disc drive device is a detection unit to optically detect a state including a type of a disc or a cartridge placed on the tray member based on whether the detection holes are shaded in the course of loading of the tray member.Type: ApplicationFiled: September 16, 2004Publication date: March 24, 2005Inventor: Tomoshi Tokunaga